Thanks TDR members. I had lived with the dreaded belt "chirp" for nearly two years. Thanks to a recent thread, I found the solution (Goodyear Gatorback), part number and source for 1/2 price purchase, as well as a tip for changing the belt. Took about 5 minutes this morning, and "No more Chirp. " Hooray!! Now the obvious question. Why don't they install this belt at the factory? Guess it's asking too much for a truck that only costs $40K!